Sewing-machine needle.



C. W. MARTIN.

SEWING MACHINE NEEDLE.v

APPLICATION FILED OUT. 22, `1910.

IPEUJU?. Patented' Apr. 29, 1913.

HARLES "Ul'f. MALIN, F MATTAPAN, MASSAGH'USET'LS, A.SSGNlR, TU UNITED SHE MACHINEltY COMPANY, J.

or Parnassia, new Jansen, n coaroneaion or new' saisine-macinata insonnia.

Specication of Letters Patent.

`application inea october ieic.

Patented Serial No. tliflw.

To all w/iom it may concern.:

Be it known that i, CHARLES lll. MARTIN, a citizen of the United States, residing at Mattapan, in the county of Suffolk and State of Massachusetts, have invented certain new and useful improvements in SewingMachine Needles; and i do hereby. declare the following to be a full, clear, and exact de-r scription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present inventionrelates to sewing machine needles, and more particularly to that type of needles used in sewing shoes.

ltis well known that vin the use of the ordinary hook-needle in sewing shoes, when the needle is retracted the hook or barb of the needle will catch on the fibers of the work, making it harder to pull the needle back through the work, and as the hook of thev needle must tear these fibers, the life of the needle is considerably shortened. This difliculty is especially pronounced in sewing through `the canvas of a Gem insole, the fibers of the canvas catchingon the hookl of the needle, and the wear and strain upon the needle in tearing out the fibers caught in the hook very soon causing the needle to break. 1

The object of my invention is to so construct a needle that the fibers which would be caught by the needle hook shall be cut away, thus allowing the needle to be pulled freely backward through th work.

With vthe above object in view, the present invention consists in the needle hereinafter described as defined in the claims.

A preferred embodiment of my invention is shown in connection with thel usual curved hook needle in use on the Goodyear type of shoe sewing machines, but it is to be understood, however, that my invent-ion lis equally applicable to other types of needles.

ln the drawings, Figure l is a side view of the needle, and Fig. 2 is an enlarged top view of the end of the needle.

The needle is formed with a notch 1 across hook 3 to the point 2.. The side or wall ot the notch l opposite the thread-engaging hook 3 is formed with aI lit-shaped shoulder 5 which constitutes a cutter for severing the fibers of the work adjacent the needle hook as the, needle pierces thework.

lNhen the needle penetrates the work, the

fibers of the work which are stretched across i the notched side of the needle,

ylf-shaped shoulder 5, so that when the neledle are cut by the is retracted from the work the hook 3 is pulled through the needle hole without catching these fibers, which it would otherwise catch if they had not been severed by the cutting shoulder 5. llt will be seen4 that by forming the cutting shoulder 5 on the needle l have in a very simple manner provided a needle which will be more easily retracted through the work than the needles in present use, and which avoids the tear and strain on the thread-engaging hook, thereby greatly lengthening the life of the needle and causing less strain upon the needle actuating mechanism. V

Having t-hus described my invention, what l claim is: i

1. A needle provided with a thread-engaging hook and a work-cuttingshoulder formed opposite and facing said hook for vcutting the work during the work penetrating stroke of the needle, substantially asY ting shoulder formed onthe side thereof and directed toward the point of the needle for cutting the work during the work penetratin stroke of the needle, substantially as descried.

3. A needle provided with a notch having a thread-engaging hook formed on one wall of the notch, and having a work-cutting shoulder formed on the wall of the notch opposite the said thread-engaging hook, substantially as described.

4. A needle rovided with a thread-engag-ing hook an with a workcutter located above the hook andl having its cutting edge directed toward the point of the needle so as to cut the work during the penetrating stroke of the needle, substantially as described.

5. A. needle provided wtha notch across the side of the needle shank, a thread-engag- Work penetrating stroke of the needle, sublng hook formed on one Wall of the notch stntlally as described.

to draw back a loop of threadupon the re- CHARLES W. MARTIN. traction of the needle, and l cutting shoul- Witnesses: 5 der formed on the other Wall of the notch MARGARm L. GILMAN,

opposite said hook to cut the Work upon the WARREN Gr. OGDEN. 

